TROPICAL STORM 18W [UNNAMED]

18W (UNNAMED) MAX WIND SPEED PER AGENCY:

+ USA (JTWC/1-min avg): 65 km/hr
+ Japan (JMA/10-min avg): 55 km/hr

TROPICAL STORM 18W [UNNAMED]
T2K PUBLIC ADVISORY NUMBER 007
5:00 AM PST (21:00 GMT)
Wed 30 September 2009
Source: T2K ANALYSIS / JTWC WARNING #011
# View: Advisory Archives (2004-2009)

18W (UNNAMED) becomes a Tropical Storm as it moves quickly towards the Southern Mariana Islands including Guam.

*Residents and visitors along the Marianas should closely monitor the progress of 18W (UNNAMED).

*Kindly refer to your local warnings & bulletins issued by your country's official weather agency. This advisory is intended for additional information purposes only.

+ Forecast Outlook: 18W is expected to remain a weak system throughout the forecast outlook...this due to TS PARMA (located to the WSW) which is expected to inhibit further development. The 2 to 5-day Long-Range forecast shows the system passing very close to Guam this afternoon. 18W shall enter the Philippine Area of Responsibility (PAR) on early Friday evening (Oct 2) as a downgraded Depression and shall be absorbed into the circulation of TS PARMA, which is a much stronger system.

+ Effects: 18W's circulation remains small. This system will bring light to moderate rainfall across the Marianas today.

[Important Note: Please keep in mind that the above forecast outlook, effects, current monsoon intensity, & tropical cyclone watch changes every 6 to 12 hrs!]

Time/Date: 5:00 AM PST Wed September 30 2009
Location of Center: 12.9º N Lat 147.0º E Lon
Distance 1: 235 km (132 nm) ESE of Guam, CNMI
Distance 2: 290 km (155 nm) SSE of Saipan, CNMI
MaxWinds (1-min avg): 65 kph (35 kts) near the center
Peak Wind Gusts: 85 kph (45 kts)
Saffir-Simpson Scale: Tropical Storm
Coastal Storm Surge Height: 1-3 feet [0.3-0.9 m]
Central Pressure: 996 millibars (hPa)
Recent Movement: WNW @ 28 kph (15 kts)
General Direction: Marianas
Size (in Diameter): -- km (--- nm) / N/A
Max Sea Wave Height (near center): 16 ft (4.8 m)
NWS-Guam TrackMap (for Public): 5 AM PST Wed Sep 30
JTWC Ship Avoidance TrackMap: 18 GMT Tue Sep 29
TSR Wind Probabilities: Current to 3-days Ahead
Zoomed Satellite Pic: Near Real-Time
Wunderground Animation: 6-12 hr. GIF Loop